package com.yhy.auth.extension.wechat;

import com.yhy.common.security.constant.GrantTypeConstant;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.security.authentication.AbstractAuthenticationToken;
import org.springframework.security.authentication.AccountStatusException;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.core.Authentication;
import org.springframework.security.oauth2.common.exceptions.InvalidGrantException;
import org.springframework.security.oauth2.provider.*;
import org.springframework.security.oauth2.provider.token.AbstractTokenGranter;
import org.springframework.security.oauth2.provider.token.AuthorizationServerTokenServices;

import java.util.LinkedHashMap;
import java.util.Map;

/**
 * @author Jax-li
 */
@Slf4j
public class WechatTokenGranter extends AbstractTokenGranter {

    private static final String GRANT_TYPE = GrantTypeConstant.WECHAT;

    private final AuthenticationManager authenticationManager;

    public WechatTokenGranter(AuthenticationManager authenticationManager,
                              AuthorizationServerTokenServices tokenServices,
                              ClientDetailsService clientDetailsService, OAuth2RequestFactory requestFactory) {
        this(authenticationManager, tokenServices, clientDetailsService, requestFactory, GRANT_TYPE);
    }

    protected WechatTokenGranter(AuthenticationManager authenticationManager,
                                 AuthorizationServerTokenServices tokenServices,
                                 ClientDetailsService clientDetailsService, OAuth2RequestFactory requestFactory,
                                 String grantType) {
        super(tokenServices, clientDetailsService, requestFactory, grantType);
        this.authenticationManager = authenticationManager;
    }

    @Override
    protected OAuth2Authentication getOAuth2Authentication(ClientDetails client, TokenRequest tokenRequest) {
        Map<String, String> parameters = new LinkedHashMap<>(tokenRequest.getRequestParameters());
        String code = parameters.get(GrantTypeConstant.WECHAT_PARAM.JS_CODE);
        String encryptedData = parameters.get(GrantTypeConstant.WECHAT_PARAM.ENCRYPTED_DATA);
        String iv = parameters.get(GrantTypeConstant.WECHAT_PARAM.IV);

        if (StringUtils.isAnyBlank(encryptedData, iv, code)) {
            log.error("登录参数不足 {}, {}, {}", code, encryptedData, iv);
            throw new InvalidGrantException("微信登录参数不足");
        }
        Authentication userAuth = new WechatAuthenticationToken(code, encryptedData, iv);
        ((AbstractAuthenticationToken) userAuth).setDetails(parameters);
        try {
            userAuth = authenticationManager.authenticate(userAuth);
        } catch (AccountStatusException | BadCredentialsException ase) {
            throw new InvalidGrantException(ase.getMessage());
        }
        if (userAuth == null || !userAuth.isAuthenticated()) {
            throw new InvalidGrantException("Could not authenticate user for code: " + code);
        }
        OAuth2Request storedOAuth2Request = getRequestFactory().createOAuth2Request(client, tokenRequest);
        return new OAuth2Authentication(storedOAuth2Request, userAuth);
    }

}
